Brake Controller Showing Short in the System

MegaJohn wrote:
On the way home Sunday from our last outing our brake controller reads a short in the system. We made it home safely, but the brakes were in & out the whole way home.

I used my test light to check the brake wire to positive at the 7-pin connector and it would light. I'm not sure this is a good test though, as it may have only completed the circuit.

If I use my ohm meter, could I narrow my search to the truck or the camper? If it's in the camper, I expect I could then remove each drum's magnet from the circuit by cutting the wires leading to the drum to find which is having a problem.

I'd like to avoid having to pull each hub to check the wires inside... I just packed the bearings last spring. I could do it, just trying to avoid it if I can.

Now that I think about it... Could I disconnect the brake system's ground then test the brake wire to positive?

As you can see, I need assistance from others more experienced. Thanks in advance for your help!

Happy Camping!
John.

Do any of your wires pass through the axle? Very common issue of insulation chafing at that point causing an intermittent fault.
You can replace the wiring, or sleeve it in plastic conduit to keep it away from sharp metal edges.
Dollars to donuts that is where the issue is, unlikely to be the truck.